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January 6-7 Storm Discussion: we’re due?


WxUSAF
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32 minutes ago, Weather Will said:

WB 6Z EURO is meh....

IMG_2694.png

Where's the moisture? There's no thump for western areas.

Hagerstown is down to .40 lol.

If there was a heavy thump western areas would of been alot better.

 

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Just now, Chris78 said:

Where's the moisture? There's no thump for western areas.

Hagerstown is down to .40 lol.

If there was a heavy thump western areas would of been alot better.

 

I think we all hope the euro is up to 2022-2024 euro things, and not pre 22 dr.no that was right a lot things.

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I think we all hope the euro is up to 2022-2024 euro things, and not pre 22 dr.no that was right a lot things.

Or it’s better to use mesos. I don’t know we get what we get out here in NW section. Not worth hand wringing some are having.
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2 minutes ago, WinterWxLuvr said:

Actually the moisture on most of the models was pretty consistent with only slight drops. The stunning drops in snowfall output would be due to something the models are all of a sudden seeing regarding the thermals.

The 6z euro was pretty dry compared to other guidance and that was immediately following it juicing back up yesterday. 
 

we crushed 6z euros in the lead up this one, have gone 0/4 so far. 

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From LWX

Winter Storm Watches remain in effect along and west of US-15. Snow
totals also increased a bit for the higher elevations of northern
MD, particularly along Parr`s Ridge where the Winter Storm Watch was
expanded into Northern Baltimore County. A decision on whether to
upgrade to a Winter Storm Warning or Advisories will be made later
this morning. Advisories are expected to be issued today for the
tier of counties east of the current watches.

Ice accretion amounts up to two tenths of an inch are possible in
parts of the Central Shenandoah Valley into Central VA, including
the Blue Ridge, with a trace up to a few hundredths of an inch of
ice possible elsewhere in the Watch area. Snow/sleet amounts will
vary, though looking at 4-6" along and northwest of a line from
Spruce Knob to Winchester to Westminster. Between that line and US-
15 snow/sleet amounts could vary between 1-3". Between US-15 and I-
95 in Virginia, and east of Parr`s Ridge in Maryland snow/sleet
amounts between a trace to a couple tenths of an inch.
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Just now, Terpeast said:

From LWX

Winter Storm Watches remain in effect along and west of US-15. Snow
totals also increased a bit for the higher elevations of northern
MD, particularly along Parr`s Ridge where the Winter Storm Watch was
expanded into Northern Baltimore County. A decision on whether to
upgrade to a Winter Storm Warning or Advisories will be made later
this morning. Advisories are expected to be issued today for the
tier of counties east of the current watches.

Ice accretion amounts up to two tenths of an inch are possible in
parts of the Central Shenandoah Valley into Central VA, including
the Blue Ridge, with a trace up to a few hundredths of an inch of
ice possible elsewhere in the Watch area. Snow/sleet amounts will
vary, though looking at 4-6" along and northwest of a line from
Spruce Knob to Winchester to Westminster. Between that line and US-
15 snow/sleet amounts could vary between 1-3". Between US-15 and I-
95 in Virginia, and east of Parr`s Ridge in Maryland snow/sleet
amounts between a trace to a couple tenths of an inch.

Reading between the lines, could be 0.5-2” just east of 15 but west of IAD

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3 minutes ago, osfan24 said:

Just being outside this morning, it's hard to believe this is going to be mostly rain. Sad times.

Depth of the airmass isn’t good enough. Yea we’re cold now because we’re directly under the axis of the northerly flow behind an amplifying wave. But at its zenith the cold barely gets south of us and isn’t expansive so as soon as the return southerly flow hits ahead of the next wave it’s easily scoured out. But hey we’re only 12 days after the long wave flow changed and the pac puke was cut off. . We need at least 3 weeks of a good long wave pattern to have any chance to be cold enough. 

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My best hope now is that I get super cold tonight and before temps torch tomorrow the precip comes in as rain and there is a quick ice.  I will go skating down my street and hit the melted part and face plant into the pavement.  

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11 hours ago, MillvilleWx said:

The reasoning for the shift in the colder solution on the NAM is the development of a closed 850mb low tracking south of the Potomac over north-central VA. Pay close attention to the wind barb across the northwest area and how the 850mb southeasterlies hit a brick wall over Parrs Ridge and the wind direction flips. This would allow for cold air to advect into the northern and western side of the circulation creating a more beneficial PBL and keep everything frozen, or even all snow. Check out the wind barbs to the east of RNK...

702073097_850mbNestHeights.thumb.PNG.d0b882a55011c05af6a003d70ae4d480.PNG

 

As a result, watch the 850mb temp profile as we work through time. This is actually how you get surprises and periods of heavy snow when you weren't expecting. 

floop-nam4km-2024010500.850th.us_ma.thumb.gif.6b9f1626f5eff1c4ff3c8decf3a00ab5.gif

 

MAJOR CAVEAT.... THIS IS JUST ONE RUN OF ONE MODEL!!!

We are going to want to see other guidance pull this off and have it become something to watch. This could be a one run and done deal, but there is potential for this. I will not be committing anything until I see some agreement from other guidance. It was interesting to see and point out as a possibility. It would affect the forecast in a big way. These are why these marginal events are so tricky. One thing can make or break a forecast. Let's hope it's right. Right now, no changes from my current thinking. 

 

I assume any hope of this basically evaporated last night

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1 hour ago, nj2va said:

Great use of tax dollars.

Wouldn't be surprised if they didn't spray one snowfall a time ago and some person sued the DOT over an accident they had blaming they didn't treat roads to get out of paying for damages themselves and won. So now its spray all the time just to CYA.

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